Synovial cyst of popliteal space [Baker]
Synovial cyst of popliteal space [Baker]
M71.2 is a header (parent) code in the ICD-10-CM hierarchy. It is not billable for claim submission. Use one of the billable child codes listed below.
Billable codes in this category
Each of the codes below is billable. Choose the one that most accurately describes the patient's diagnosis.
A fluid-filled synovial cyst arising in the popliteal fossa (Baker's cyst) where the affected knee is not specified as right or left in the documentation.
Baker's cyst (synovial cyst of the popliteal space) specifically involving the right knee — a fluid-filled sac arising from the semimembranous bursa or the knee joint capsule, located in the posterior popliteal fossa.
M71.22 identifies a Baker's cyst (synovial cyst of the popliteal space) specifically located at the left knee — a fluid-filled sac that forms behind the left knee joint when excess synovial fluid accumulates in the popliteal fossa.
Inclusion & exclusion notes
Excludes 1 (mutually exclusive — never code together)
- synovial cyst of popliteal space with rupture (M66.0)